Magnetothermal Convection on the Thermally Stratified Fluid Layer by Permanent Magnets

Kaneda, Masayuki; Wada, Kengo; Nazato, Kensuke

doi:10.1615/jenhheattransf.2022041934

Cited by 2 publications

(5 citation statements)

References 11 publications

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“…The flow pattern and temperature profile is symmetrical and in steady state. This is an extension of two-dimensional result of Kaneda et al [11]. It is interesting that both results are similar even though the magnetic field pattern is different.…”

Section: Without Gravity (Pure Magnetothermal Convection)supporting

confidence: 81%

“…The initial computational condition was that the fluid was at the average temperature (T=1.5). It should be noted that, the LBM code developed in this study has been validated with experiment in our previous work [9][10][11][12].…”

Section: Heat and Fluid Flow Under A Magnetic Fieldmentioning

confidence: 90%

“…The gradient of the magnetic flux density can be enhanced by using the multiple magnets so that the magnetic poles are placed closer. We found that it can be obtained near the magnet junction of two magnets aligned alternate poles like NS [11]. However, the effective area is limited locally corresponding to the junction area.…”

Section: Introductionmentioning

confidence: 90%

“…In this study, two types of magnet array are employed. First one is an alternate pole using two magnets based on our previous study [11]. This array has one magnet junction with opposite magnetic pole.…”

Section: Computed Domain With Magnet Arraymentioning

confidence: 99%

“…The computational parameters were set as follows. The Prandtl number was fixed at 13.0 which corresponds to the fluid used for our experimental studies [9,11]. The Rayleigh number was set at 5.0 ×10 4 -5.0×10 5 .…”

Section: Heat and Fluid Flow Under A Magnetic Fieldmentioning

confidence: 99%

See 4 more Smart Citations

Mixed convection by buoyancy and magnetothermal forces

Kaneda,

Yoshimura,

Suga

2024

J. Phys.: Conf. Ser.

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The magnetic force in the paramagnetic fluid depends on the local gradient of magnetic flux density and the temperature-dependent magnetic susceptibility. In the presence of the gravity, the buoyant force due to the temperature difference additionally overlaps, and the resultant flow becomes a mixed convection. In this study, the effect of the temperature-dependent magnetic force (magnetothermal force) on the natural convection was numerically investigated. The magnetic field formed by the permanent-magnet array was employed and effective one was discussed in terms of the heat transfer. A three-dimensional Rayleigh-Benard convection simulation was conducted with the magnet array below the bottom hot wall. It was found that the magnetothermal force enhances the convection not only where the magnet locates but also away from the magnet due to the force profile.

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Section: Without Gravity (Pure Magnetothermal Convection)supporting

confidence: 81%